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SK0-004 · Question #503

A datacenter has exceeded the load on the central uninterruptible power supply (UPS) for the room and is causing power load problems. Additional power is available, but not using the central UPS…

The correct answer is C. Add stand alone UPSs for new servers not wired off the central UPS. When a central UPS is overloaded, the best temporary solution is to add standalone UPS units for new servers rather than bypassing protection or going without it.

Server hardware installation and management

Question

A datacenter has exceeded the load on the central uninterruptible power supply (UPS) for the room and is causing power load problems. Additional power is available, but not using the central UPS. Which of the following is the BEST temporary solution for adding new servers until an upgrade of the central UPS can occur?

Options

  • AContinue plugging into the central UPS, but put the UPS on bypass to avoid load
  • BPlug the servers directly into the power that is not on the UPS.
  • CAdd stand alone UPSs for new servers not wired off the central UPS.
  • DContinue plugging into the central UPS because the actual load supported is actually

How the community answered

(20 responses)
  • A
    5% (1)
  • B
    10% (2)
  • C
    75% (15)
  • D
    10% (2)

Why each option

When a central UPS is overloaded, the best temporary solution is to add standalone UPS units for new servers rather than bypassing protection or going without it.

AContinue plugging into the central UPS, but put the UPS on bypass to avoid load

Putting the UPS on bypass removes all battery backup protection for every device connected to it, defeating the entire purpose of the UPS.

BPlug the servers directly into the power that is not on the UPS.

Plugging servers directly into non-UPS power provides zero protection against power outages or surges, leaving the servers vulnerable to data loss and hardware damage.

CAdd stand alone UPSs for new servers not wired off the central UPS.Correct

Standalone UPS units provide each new server with battery-backed power protection without adding any load to the already-overloaded central UPS. This solution maintains uptime protection for new equipment while the central UPS upgrade is pending. It is a recognized best practice for incremental datacenter growth when central power infrastructure is constrained.

DContinue plugging into the central UPS because the actual load supported is actually

Continuing to exceed the rated load of a central UPS risks overheating, premature failure, or a complete UPS shutdown that would take down all connected equipment.

Concept tested: UPS capacity management and temporary power solutions

Source: https://learn.microsoft.com/en-us/azure/well-architected/reliability/redundancy

Topics

#UPS#power management#datacenter power#redundant power

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